Summative Review EP 5

summative review ep 5

Matching

Match each item with the correct statement below.
a. calorimeter d. enthalpy
b. calorie e. specific heat
c. joule f. heat capacity


____ 1. quantity of heat needed to raise the temperature of 1 g of water by 1 C

____ 2. SI unit of energy

____ 3. quantity of heat needed to change the temperature of 1 g of a substance by 1 C

____ 4. quantity of heat needed to change the temperature of an object by 1 C

____ 5. device used to measure the heat absorbed or released during a chemical or physical process

____ 6. heat content of a system at constant pressure

Match each item with the correct statement below.
a. heat of reaction d. heat of fusion
b. heat of formation e. heat of solution
c. Hess's law of heat summation


____ 7. the enthalpy change for a chemical reaction exactly as it is written

____ 8. the enthalpy change caused by dissolving a substance

____ 9. the energy required to melt a solid at its melting point

____ 10. the change in enthalpy that accompanies the formation of a compound from its elements

____ 11. states that if you add two or more thermochemical equations to give a final equation, you can also add the heats of reaction to give the final heat of reaction

Match each item with the correct statement below.
a. activated complex d. activation energy
b. reaction rate e. free energy
c. inhibitor


____ 12. the minimum energy colliding particles must have in order to react

____ 13. arrangement of atoms at the peak of an energy barrier

____ 14. the number of atoms, ions, or molecules that react in a given time to form products

____ 15. a substance that interferes with a catalyst

____ 16. energy available to do work

Match each item with the correct statement below.
a. spontaneous reaction d. reaction mechanism
b. entropy e. elementary reaction
c. chemical equilibrium


____ 17. when the forward and reverse reactions take place at the same rate

____ 18. a reaction that releases free energy

____ 19. the measure of disorder

____ 20. Reactants are converted to products in a single step.

____ 21. includes all elementary reactions of a complex reaction

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

____ 22. When energy is changed from one form to another, ____.
a. some of the energy is lost entirely
b. all of the energy can be accounted for
c. a physical change occurs
d. all of the energy is changed to a useful form


____ 23. If heat is released by a chemical system, an equal amount of heat will be ____.
a. absorbed by the surroundings c. released by the surroundings
b. absorbed by the universe d. released by the universe


____ 24. A process that absorbs heat is a(n) ____.
a. endothermic process c. exothermic process
b. polythermic process d. ectothermic process


____ 25. The quantity of heat required to change the temperature of 1 g of a substance by 1 C is defined as ____.
a. a joule c. a calorie
b. specific heat d. density


____ 26. A piece of candy has 5 Calories (or 5000 calories). If it could be burned, leaving nothing but carbon dioxide and water, how much heat would it give off?
a. 500 calories c. 5000 joules
b. 5 kilocalories d. Not enough information is given.


____ 27. How many joules are in 148 calories? (1 cal = 4.18 J)
a. 6.61 J c. 148 J
b. 35.4 J d. 619 J


____ 28. What is the specific heat of a substance if 1560 cal are required to raise the temperature of a 312-g sample by 15 C?
a. 0.033 c. 0.99
b. 0.33 d. 1.33


____ 29. When 45 g of an alloy, at 25 C, are dropped into 100.0 g of water, the alloy absorbs 956 J of heat. If the final temperature of the alloy is 37 C, what is its specific heat?
a. 0.423 c. 9.88
b. 1.77 d. 48.8


____ 30. A chunk of ice whose temperature is –20 C is added to an insulated cup filled with water at 0 C. What happens in the cup?
a. The ice melts until it reaches the temperature of the water.
b. The water cools until it reaches the temperature of the ice.
c. Some of the water freezes, so the chunk of ice gets larger.
d. none of the above


____ 31. What is the standard heat of reaction for the following reaction?
Zn(s) + Cu (aq) Zn (aq) + Cu(s)
( H for Cu = +64.4 kJ/mol; H for Zn = –152.4 kJ/mol)
a. 216.8 kJ released per mole c. 88.0 kJ absorbed per mole
b. 88.0 kJ released per mole d. 216.8 kJ absorbed per mole


____ 32. When 1.0 g of solid NaOH ( H = –445.1 kJ/mol) dissolves in 10 L of water, how much heat is released?
a. 445.1 kJ c. 11.1 J
b. 405.1 kJ d. 11.1 kJ


____ 33. If sulfur dioxide and oxygen can be made into sulfur trioxide, what is the reverse reaction?
a. 2SO 2SO + O c. 2SO + O 2SO
b. SO + O SO d. SO + 2SO 3S + 4O


____ 34. What is the equilibrium constant for the following reaction?
C + O CO
a. c.
b. d.


____ 35. If a reaction has an equilibrium constant just greater than 1, what type of reaction is it?
a. irreversible c. reversible, favoring products
b. spontaneous d. reversible, favoring reactants


summative review ep 5
Answer Section

MATCHING

1. ANS: B DIF: L1 REF: p. 507 OBJ: 17.1.3

2. ANS: C DIF: L1 REF: p. 507 OBJ: 17.1.3

3. ANS: E DIF: L1 REF: p. 508 OBJ: 17.1.3

4. ANS: F DIF: L1 REF: p. 508 OBJ: 17.1.3

5. ANS: A DIF: L1 REF: p. 511 OBJ: 17.2.1

6. ANS: D DIF: L1 REF: p. 511 OBJ: 17.2.1

7. ANS: A DIF: L1 REF: p. 514 OBJ: 17.2.2

8. ANS: E DIF: L1 REF: p. 525 OBJ: 17.3.1

9. ANS: D DIF: L1 REF: p. 520 OBJ: 17.3.1

10. ANS: B DIF: L1 REF: p. 530 OBJ: 17.4.1

11. ANS: C DIF: L1 REF: p. 527 OBJ: 17.4.1

12. ANS: D DIF: L1 REF: p. 543 OBJ: 18.1.1

13. ANS: A DIF: L1 REF: p. 544 OBJ: 18.1.1

14. ANS: B DIF: L1 REF: p. 542 OBJ: 18.1.1

15. ANS: C DIF: L1 REF: p. 547 OBJ: 18.1.2

16. ANS: E DIF: L1 REF: p. 566 OBJ: 18.4.1

17. ANS: C DIF: L1 REF: p. 550 OBJ: 18.2.1

18. ANS: A DIF: L1 REF: p. 567 OBJ: 18.4.1

19. ANS: B DIF: L1 REF: p. 569 OBJ: 18.4.2

20. ANS: E DIF: L1 REF: p. 578 OBJ: 18.5.2

21. ANS: D DIF: L1 REF: p. 578 OBJ: 18.5.2

MULTIPLE CHOICE

22. ANS: B DIF: L1 REF: p. 506 OBJ: 17.1.1

23. ANS: A DIF: L1 REF: p. 506 OBJ: 17.1.1

24. ANS: A DIF: L1 REF: p. 506 OBJ: 17.1.2

25. ANS: B DIF: L1 REF: p. 507 OBJ: 17.1.2

26. ANS: B DIF: L2 REF: p. 507 OBJ: 17.1.2

27. ANS: D DIF: L1 REF: p. 507 OBJ: 17.1.3

28. ANS: B DIF: L1 REF: p. 509, p. 510
OBJ: 17.1.3

29. ANS: B DIF: L2 REF: p. 509 OBJ: 17.1.3

30. ANS: C DIF: L2 REF: p. 512 OBJ: 17.2.1

31. ANS: A DIF: L2 REF: p. 516 OBJ: 17.2.2

32. ANS: D DIF: L2 REF: p. 526 OBJ: 17.3.2

33. ANS: A DIF: L2 REF: p. 549 OBJ: 18.2.1

34. ANS: B DIF: L1 REF: p. 556 OBJ: 18.2.3

35. ANS: C DIF: L1 REF: p. 556 OBJ: 18.2.3